/* bzflag
 * Copyright (c) 1993-2020 Tim Riker
 *
 * This package is free software;  you can redistribute it and/or
 * modify it under the terms of the license found in the file
 * named COPYING that should have accompanied this file.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

// interface headers
#include "HUDuiTypeIn.h"

// system implementation headers
#include <ctype.h>

// common implementation headers
#include "FontManager.h"

// local implementation headers
#include "HUDui.h"

//
// HUDuiTypeIn
//

HUDuiTypeIn::HUDuiTypeIn()
    : HUDuiControl()
    , maxLength(0)
    , cursorPos(0)
    , allowEdit(true)
    , obfuscate(false)
    , colorFunc(NULL)
{
}

HUDuiTypeIn::~HUDuiTypeIn()
{
}

void            HUDuiTypeIn::setObfuscation(bool on)
{
    obfuscate = on;
}

int         HUDuiTypeIn::getMaxLength() const
{
    return maxLength;
}

std::string     HUDuiTypeIn::getString() const
{
    return string;
}

void            HUDuiTypeIn::setMaxLength(int _maxLength)
{
    maxLength = _maxLength;
    string = string.substr(0, maxLength);
    if (cursorPos > maxLength)
        cursorPos = maxLength;
    onSetFont();
}

void            HUDuiTypeIn::setString(const std::string& _string)
{
    string = _string;
    cursorPos = string.length();
    onSetFont();
}

// allows composing, otherwise not
void            HUDuiTypeIn::setEditing(bool _allowEdit)
{
    allowEdit = _allowEdit;
}

bool            HUDuiTypeIn::doKeyPress(const BzfKeyEvent& key)
{
    static const char backspace = '\b';   // ^H
    static const char whitespace = ' ';

    if (!allowEdit) return false; //or return true ??
    char c = key.ascii;
    if (c == 0)
    {
        switch (key.button)
        {
        case BzfKeyEvent::Up:
            HUDui::setFocus(getPrev());
            return true;

        case BzfKeyEvent::Down:
            HUDui::setFocus(getNext());
            return true;

        case BzfKeyEvent::Left:
            if (cursorPos > 0)
                cursorPos--;
            return true;

        case BzfKeyEvent::Right:
            if (cursorPos < (int)string.length())
                cursorPos++;
            return true;

        case BzfKeyEvent::Home:
            cursorPos = 0;
            return true;

        case BzfKeyEvent::End:
            cursorPos = string.length();
            return true;

        case BzfKeyEvent::Backspace:
            c = backspace;
            break;

        case BzfKeyEvent::Delete:
            if (cursorPos < (int)string.length())
            {
                cursorPos++;
                c = backspace;
            }
            else
                return true;
            break;

        default:
            return false;
        }
    }

    if (c == '\t')
    {
        HUDui::setFocus(getNext());
        return true;
    }
    if (c >0 && (!isprint(c) && c != backspace))
        return false;

    if (c == backspace)
    {
        if (cursorPos == 0)
            return true;

        cursorPos--;
        string = string.substr(0, cursorPos) + string.substr(cursorPos + 1, string.length() - cursorPos + 1);
        onSetFont();
    }
    else if (c > 0)
    {
        if (isspace(c))
            c = whitespace;
        if ((int)string.length() == maxLength)
            return true;

        string = string.substr(0, cursorPos) + c + string.substr( cursorPos, string.length() - cursorPos);
        cursorPos++;
        onSetFont();
    }
    return true;
}

bool            HUDuiTypeIn::doKeyRelease(const BzfKeyEvent& key)
{
    if (key.ascii == '\t' || !isprint(key.ascii)) // ignore non-printing and tab
        return false;

    // slurp up releases
    return true;
}

void            HUDuiTypeIn::doRender()
{
    if (getFontFace() < 0) return;

    // render string
    glColor3fv(hasFocus() ? textColor : dimTextColor);

    FontManager &fm = FontManager::instance();
    std::string renderStr;
    if (obfuscate)
        renderStr.append(string.size(), '*');
    else
        renderStr = string;
    if (colorFunc)
        renderStr = colorFunc(renderStr);
    fm.drawString(getX(), getY(), 0, getFontFace(), getFontSize(), renderStr);

    // find the position of where to draw the input cursor
    const std::string noAnsi = stripAnsiCodes(renderStr);
    float start = fm.getStrLength(getFontFace(), getFontSize(), noAnsi.substr(0, cursorPos));

    if (HUDui::getFocus() == this && allowEdit)
        fm.drawString(getX() + start, getY(), 0, getFontFace(), getFontSize(), "_");
}

// Local Variables: ***
// mode: C++ ***
// tab-width: 4 ***
// c-basic-offset: 4 ***
// indent-tabs-mode: nil ***
// End: ***
// ex: shiftwidth=4 tabstop=4
